Add new app dedicated for training soft cascades.
feature pool generation:
    - use random from tr1 extension
    - extend cv::Boost
add file globbing
debug output information.
Positives preprocessing
add negatives generation
set parameters
add ability to store/load training configuration
load from config xml and fix integral representation
fix feature computing
refactoring
store result to xml.
integrate pruning
commented debug out
add xml serialization
fix typo
amplement weidhting according to L. Bourdev and J. Brandt paper "Robust Object Detection Via Soft Cascade"
fix inintial weighting
write features to soft cascade xml
script for scaling inria dataset for multiple-octaves training